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Thin film thermal shrinkage measuring method and measuring device

A technology of thermal shrinkage rate and measurement method, which can be used in measuring devices, material thermal analysis, instruments, etc. It can solve the problems of inaccurate length measurement and film heating deformation, and achieve the effect of accurate thermal shrinkage rate.

Inactive Publication Date: 2017-06-13
CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method and device for measuring the heat shrinkage rate of a film, which is used to solve the problem of inaccurate length measurement caused by heat deformation of the film

Method used

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] method embodiment

[0026] like figure 1 As shown, the measurement method of film heat shrinkage adopts the following steps:

[0027] (1) Turn on the oven and prepare for the test when the temperature of the oven rises to the set value and stabilizes for more than 30 minutes;

[0028] (2) Cut and use a clamp to clamp the film sample, and cut the cigarette film into a certain size, 100mm-300mm in length and 5mm-10mm in width. Specifically, the cigarette film can be cut into a side length of about 120mm in width 5mm rectangle (the sample test length is 100mm, but considering the length of the clamps on both sides, the actual length of the sample cut is about 120mm);

[0029] (3) The tensile force at the two ends of the clamps of the film sample reaches the set value of the tensile force, so that the film sample is in a moderately tensioned state, and ...

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Abstract

The invention relates to the technical field of thin film physical property detection, in particular to a thin film thermal shrinkage measuring method and measuring device. The measuring method comprises the steps of measuring the length of a thin film sample as the thin film initial length L1 before heating; putting the thin film sample into heating equipment to be heated; taking the thin film sample out the heating equipment, cooling, stretching the thin film sample to a tension state, recording the length of the thin film sample at the moment as the thin film deformation length L2 and calculating out the thin film thermal shrinkage according to the thin film initial length L1 and the thin film deformation length L2 by combining a shrinkage calculating formula. The measuring method is used for solving the problem that the length of a heated and deformed thin film cannot be accurately measured.

Description

technical field [0001] The invention relates to the technical field of film physical performance detection, in particular to a method and a measuring device for measuring the heat shrinkage rate of a film. Background technique [0002] Films are widely used in various fields, especially cigarette films are co-extruded and stretched from a variety of polymer materials, with high transparency and gloss, non-toxic materials, stable molecular structure, and certain resistance to odor and moisture. Barrier function, so it is a better cigarette packaging material. The heat shrinkage rate of the film refers to the change rate of the size of the film under certain temperature conditions and within a certain period of time. It is an important technical index of the film characteristics. The shrinkage rate can make the outer packaging of cigarettes have a tighter and more uniform wrapping property, avoid the problems of wrinkles and incomplete packaging on the packaging cover, and ke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 周明珠刘勇王锦平邢军张龙孟庆华李志刚李晓辉董浩花昌义周德成孙淼
Owner CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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